Abstract
We consider dissipative Alfven waves in a viscous atmosphere with a magnetic field, so that the electrical conductivity is considered as a non-diagonal tensor. Under a vertical uniform magnetic field we consider transverse magnetic and velocity perturbations. We obtain two decoupled second-order systems to right and left polarized Alfven waves. The first electrical diffusivity χ1 and the viscous diffusivity η are associated with “real” damping; the second electrical diffusivity χ2 is associated with “imaginary damping”. Boundary conditions are imposed in order to obtain the velocity perturbation spectrum of an Alfven wave. The velocity perturbation is plotted versus altitude over a distance of five scale heights, for different values of the parameters.
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